Feat here: https://imgur.com/a/lEkeIwe. Hamster and Gretel punch an asteroid back the way it came

The average semi-truck is 13.5 feet tall, or 4.1148 meters

(ignore the blue line)

Truck height (red) - 387 pixels and 4.1148 meters

Meteor chunk (yellow) - 537 pixels and 5.70968372093 meters

(As the size of the meteor is consistently far larger than it appears in this scene, scaling the size from Gretel here is likely a no-go)

Chunk (yellow) - 176.67 pixels and 5.70968372093 meters

Meteor diameter (red) - 1003.62 pixels and 32.4353471218 meters

Radius is 16.2176735609 meters, so volume is 17,867.1084125 m^3

Density of chondrites is 3100 kg/m^3

55,388,036.0787 kg

For speed, earlier Kevin says that there is four minutes until the meteor hits a building. When he says this, on his computer it looks like the meteor is next to a satellite, with one in low orbit being around 5,900 km above sea level. However, the actual elapsed time in the episode is about 45 seconds from when it’s shown to when they punch it. I will use two speeds to account for this discrepancy.

Also remember to divide by 2 because it’s both Hamster and Gretel

5,900,000 / 240 = 24,583.3333333 m/s or mach 71.6715257532 (Mach 71.67 - High Hypersonic+)

(24,583.3333333^2) * 55,388,036.0787 * ½

1.6736610555e+16 / 2

8.3683052773e+15 joules or 2,000,072.96304 tons of TNT

2 megatons of TNT - Small City level

5,900,000 / 45 = 131,111.111111 m/s or mach 382.24813735 (Mach 382.25 - Massively Hypersonic)

(131,111.111111^2) * 55,388,036.0787 * ½

4.7606358911e+17 / 2

2.3803179456e+17 joules or 56,890,964.2819 tons of TNT

56.89 megatons of TNT - City level

Oh also Hamster and Gretel punch at the same speed as the meteor so they would scale to the meteor’s speed individually.